Mechtogan Activator
From The Bakugan Wiki
Mechtogan Activators are a special type of Gate Cards that are used on Mechtogan in Bakugan: Mechtanium Surge. On one side, it features the Mechtanium Surge logo and on the other side, it has a detailed picture of the corresponding Mechtogan. They are used to open a Mechtogan by swiping it on the Mechtogan's back or on the arms to activate the weapons on the arms. Every Mechtogan comes with one.